How is the sidebar of this passage related to the central ideas of the passage?

Responses
A The sidebar provides a contrasting perspective to the ideas presented in the larger passage.The sidebar provides a contrasting perspective to the ideas presented in the larger passage.
B The sidebar attempts to persuade the readers that the duck-billed dinosaur species is the best.The sidebar attempts to persuade the readers that the duck-billed dinosaur species is the best.
C The sidebar gives personal, emotive insight into the discoveries presented in the longer passage.The sidebar gives personal, emotive insight into the discoveries presented in the longer passage.
D The sidebar suggests how the duck-billed dinosaur species in general relate to the specific dinosaur Velafrons.The sidebar suggests how the duck-billed dinosaur species in general relate to the specific dinosaur Velafrons.

D The sidebar suggests how the duck-billed dinosaur species in general relate to the specific dinosaur Velafrons.